一、
产品简介（Product Introduction）：
双壁管是一种内层附有热熔胶的半柔性热缩管，外层是由辐射交联聚烯烃组成，内层是专门设计的胶性内壁；加热时内壁熔融，并随外壁收缩填充孔隙或缝隙，冷却后，双壁管壁厚均匀、坚实。广泛应用于电子设备的接线防水，电线分支处的密封固定，金属管线的防腐保护，以及防止由高分子链松弛产生的松动和脱落，如水下灯饰、汽车油管、高级线束等。
DWT is manufactured by co-extrusion of irradiated crosslinking polyolefin and specifically designed hot melt adhesive. This tubing maybe used in a wide variety of electrical applications, including back end connector sealing , breakouts, and connector to cable transitions. High expansion ratio makes it possible to repair most damaged cable jackets without removing connectors.
二．特性参数 （Specifications）
项 目 Items | 特性 Specifications |
收缩温度/℃ Shrink Temperature | 110 |
连续使用温度/℃ Operating Temperature Range | -55—125 |
抗张强度/MPa Tensile Strength | ≥10.4 |
断裂伸长率/% Ultimate Elongation | ≥200 |
径向收缩率/% Radial shrinking ratio | ≥50 |
轴向收缩率/% Longitudinal Change | ≤10 |
空气烘箱老化 Aging in Circulating-air Oven | 158.0±1.0℃, 168hrs |
热老化后 After Aging | 抗张强度/MPa Tensile Strength | ≥7.3 |
断裂伸长率/% Ultimate longation | ≥100 |
耐压V | 600 |
击穿强度/kV/mm Dielectric Strength | ≥15.0 |
体积电阻率/Ω.cm Volume Resistivity | ≥1013 |
阻燃性 Flammability | VW-1 |
吸水性/%嗯 Water Absorption | less than 0.4% |
流变性 Fluid Resistance | 好 Excellent |
铜腐蚀 (Copper Corrosion) | 无腐蚀 (No Corrosion) |
软化点/℃ Softening Point | 120±5 |
剥离强度/N/25mm Tissue Strength | >80 |
